Microblogging is a broadcast medium in the form of blogging. A microblog differs from a traditional blog in that its content is typically much smaller, in both actual size and aggregate file size. Microblogs “allow users to exchange small elements of content such as short sentences, individual images, or video links”.
As with traditional blogging, microbloggers post about topics ranging from the simple, such as "what I'm doing right now," to the thematic(主题的), such as "sports cars.” Commercial microblogs also exist, to promote (促进) websites, services and/or products, and to promote collaboration within an organization.
Some microblogging services offer features such as privacy settings, which allow users to control who can read their microblogs, or other ways of publishing rights besides entering the web-based interface.(界面) These may include text messaging, E-mail, or digital audio.
The first microblogs were known as tumblelogs. The term was invented in a blog post on April 12, 2005. However, by 2006 and 2007, the term microblog came into greater usage for such services provided by Tumbler and Twitter. Other leading social networking websites Facebook, MySpace, LinkedIn, and XING also have their own microblogging features, better known as status updates.
Several studies, especially by Harvard Business School have tried to analyze the usage behavior of Microblogging services. Many of these studies show that for services such as Twitter, there is a small group of active users contributing to most of the activity.
Twitter, Facebook and other microblogging services are also becoming a platform for marketing and public relations, with a sharp growth in the number of social media marketers. The Sysomos study shows that this specific group of marketers on Twitter is much more active than general user population, with 15% following more than 2,000 people.
【小题1】Why is a microblog different from a traditional blog?

Glaucoma（青光眼）is a major cause of blindness around the world, especially in developing countries. The World Health Organization says glaucoma is a greater public health challenge than cataracts（白内障）, because the blindness caused by the latter can be cured after operations.
Glaucoma is a disease that makes people around the world lose their sight, and they usually don’t even know they have the disease until it has permanently destroyed at least 40 percent of their sight. The process is usually so painless and subtle（不明显的）, so people don't notice it. Actually, the simplest medical test can discover it.
“It is the leading cause of blindness in the United States. In Hispanics and in African-Americans, it’s the second leading cause of blindness and so is the case in the Chinese and Indians.” said Dr. Alan Robin, a specialist in treating glaucoma. “The glaucoma we see in sub-Saharan Africa is a much more aggressive blinding disease than the glaucoma we see in Americans or even African- Americans in-the United States.” he said．     ．
Dr. Eric Fleischer also sees these differences at Medstar Washington Hospital Center. “Pretty much anybody who has ancestors in Africa has an increased chance of developing glaucoma.” Age is another thing that may lead to glaucoma, although people of all ages can get it.
Glaucoma is a group of diseases that commonly produce pressure in the eye. An eye is sort of like a watch. And behind the face of the watch, liquid is made. It goes through your pupil（瞳孔）and into the front of the watch between the face and the crystal．There's an area around the edge of the watch that drains（使排出）the liquid. When that drain is blocked, the liquid can't leave the eye as fast as it is produced. The rising pressure within the eye damages and eventually kills the optic（视觉的） nerve. The result is blindness.
Fortunately, if caught early, glaucoma can be controlled. Glaucoma is not curable. But as  researchers worldwide lean more about it, they grow more hopeful that glaucoma can one day be cured or even prevented.
【小题1】In which country is glaucoma the biggest danger to people’s sight?

B
While still in its early stages, welfare reform has already been judged a great success in many states — at least in getting people off welfare. It’s estimated that more than 2 million people have left the rolls（名册） since 1994.
　　In the past four years, welfare rolls in Athens Country have been cut in half. But 70 percent of the people who left in the past two years took jobs that paid less than $6 an hour. The result: The Athens Country poverty rate still remains at more than 30 percent — twice the national average.
　　For advocates（代言人）for the poor, that’s an indication much more needs to be done.
　　“More people are getting jobs, but it’s not making their lives any better,” says Kathy Lairn, a  policy analyst at the Center on Budget and Policy Priorities in Washington.
　　A center analysis of US Census data nationwide found that between 1995 and 1996, a greater percentage of single, female-headed households were earning money on their own, but that average income for these households actually went down.
　　But for many, the fact that poor people are able to support themselves almost as well without government aid as they did with it is in itself a huge victory.
　　“Welfare was a poison. It was a toxin（毒素）that was poisoning the family,” says
Robert Rector, a welfare-reform policy analyst. “The reform is changing the moral climate in low-income communities. It’s beginning to rebuild the work ethic（道德观）, which is much more important.”
　　Mr. Rector and others argued that once “the habit of dependency is cracked,” then the country can make other policy changes aimed at improving living standards.
45. From the passage, it can be seen that the author _______.
　　A. believes the reform has reduced the government’s burden
　　B. insists that welfare reform is doing little good for the poor
　　C. is overenthusiastic about the success of welfare reform
　　D. considers welfare reform to be basically successful
46. Why aren’t people enjoying better lives when they have jobs?
　　A. Because many families are divorced.
　　B. Because government aid is now rare.
　　C. Because their wages are low.
　　D. Because the cost of living is rising.
47. From the passage we know that welfare reform aims at _______.
　　A. saving welfare funds
　　B. rebuilding the work ethic
　　C. providing more jobs
　　D. cutting government expenses
48. According to the passage before the welfare reform was carried out, _______.
　　A. the poverty rate was lower
　　B. average living standards were higher
　　C. the average worker was paid higher wages
　　D. the poor used to rely on government aid

It may not be news to parents of teenage girls, but researchers have confirmed that no one can stop their 16-year-old daughter from deciding how the family spends its money.
The willpower and determination of teenage girls give them a big say in how a family’s money is spent on everything from food and meals to mobile phones, and, of course, clothes. Teenage boys did not show up at all in the analysis, which was designed to find out the influence of young people on household spending.
The findings on the spending power of teenage girls were calculated from Office for National Statistics records of family spending during the 1980s and 1990s. Researchers examined how much money went on services and leisure goods in different kinds of homes. They checked spending on food, restaurant meals, alcohol, tobacco, services, heating, transport, clothes and sports in 2,745 British families.
They found that teenage girls in the UK typically played an active role in family decisions about the allocation（分配）of household resources. But older children— those over the age of 21 who are still living with their parents—appear to have no say in household decisions.
They also tried to calculate to what extent the bargaining power of a teenager affected family budgets. “Every parent knows that children, even at a very early age, have their own preferences with regard to consumption, researchers said. “But children are only interested in a limited range of goods—mainly sweets and toys—and parents are able to use punishment to reduce their children’s bargaining power or remove it.”  When they become teenagers, however, girls are much more independent and they are capable of earning their own money, which improves their bargaining power in family decisions.
The researchers could not explain why girls have more influence over spending while the evidence for boys is much less conclusive. However, this study could be of great significance to market research and how marketers target children.
【小题1】 From the passage we can learn that            .

Michael Joseph Jackson was born on August 29,1958 in Gary, Indiana. Being the seventh child in his family, Michael was often physically abused (虐待) by his father, beaten up and also orally abused. But Michael also owed his success to his father’s strict discipline.
Michael was always an entertainer. Even when he just started school, he would perform in front of his friends and classmates. He started his professional music career at the age of 11, as a member of The Jackson Five.
He is well-known for increasing the popularity of MTV through his music videos. Before this, music videos were made just to promote the album. But Michael’s videos managed to change that by making them an art and a big business. Some of the music videos that are good examples of this are Beat It, Billie Jean, and thriller。Through these works the world got caught onto the idea of music videos and focused on music video channels.
Michael enthralled his fans and audience with his style of singing, dressing, and his complex dance moves, especially the moonwalks all around the world to show their love for him.
Through his work and various foundations(基金会), Michael raised and donated millions to charity, which is much more than any showman. He supported 39 charities in all. Apart from that, he had a great love for children, especially the poor ones, and he felt that children were the best thing than God.
Michael planned to start a 50-concert tour in July 2009. Sadly  on June 25^th, 2009, Michael passed away at home. Besides a great performer, showman and entertainer, he was a good and charitable person. Nobody can be another graeter entertainer like Michael Jackson ever again.
【小题1】According to the passage, Michael Jackson _____.